Life and work keep having the nasty habit of intruding into this blog, but it feels nice to resume writing, even if just with a short comment.
We learned a few weeks ago that the Bank of Japan has walked one extra step in its attempt to escape lowflation, and that it has committed to overshoot its 2% inflation target. A “credible promise to be irresponsible”, as the FT says quoting Paul Krugman.
This may be a long overdue first step towards a revision of the inflation target, as invoked long ago by Olivier Blanchard, and more recently by Larry Ball. This is all too reasonable: if the equilibrium interest rates are negative, if monetary policy is bound by the zero-or-only-slightly-negative-lower-bound, higher inflation targets would make sense, and 4% is an arbitrary target as legitimate as the current also arbitrary 2% level. Things may be moving, as the subject was evoked, if not discussed, at the recent Central Bankers gathering in Jackson Hole. We’ll see if anything comes out of this.
But the FT also adds an interesting comment to the BoJ move, namely that the more serious risk is a blow to credibility. If it failed to lift the inflation to the 2% target, how can it be credibly believed to overshoot it?
This is a different sort of credibility issue, much more reasonable indeed, than the one we have been used to in the past three decades, linked to the concept of dynamic inconsistency. In plain English the idea that an actor has no incentive to keep prior commitments that go against its own interest, and hence deviates from the initial plan. Credibility was therefore associated to changing incentives over time (typically for policy makers), and invoked to recommend rules over discretion.
Today, eight years into the zero lower bound, we go back to a more intuitive definition of credibility: announcing an objective and not being able to attain it.
The difference between the two definitions of credibility is not anodyne. In the first case, the unwillingness of central banks to behave appropriately can be corrected through the adoption of constraining rules. In the latter, the central bank cannot attain the objective regardless of incentives and constraints, and other strategies need to be put in place.
The other strategy, the reader will not be surprised to learn, is fiscal policy. Monetary dominance is in fact a second tenet of the Consensus from the 1990s that the crisis has wiped out. We used to live in a world in which structural reforms would take care of increasing potential growth, monetary policy would be used to take care of (minor) demand-driven fluctuations, and fiscal policy was in a closet.
This is gone (luckily). Even the large policy making institutions now call for a comprehensive and multi-instrument policy making. The policy mix, a central element of macroeconomics in the pre-rational expectations era, is now back. Even the granitic dichotomy between short (demand driven) and long (supply driven) term, is somewhat rediscussed.
The excessively simplified consensus that dominated macroeconomics for the past thirty years seems to be seriously in trouble; complexity, tradeoffs, coordination, are now the issues discussed in academia and in policy circles. This is good news.
Two articles on today’s Financial Times puzzle me. The first (Weidmann warns of currency war risk) offers yet another example of how economic analysis sometimes leaves the way to ideological beliefs. The Bundesbank’s president argues (as he already did in the past) that giving up inflation targeting hampers central bank independence. How? Why? He does not bother explaining.
What I think he has in mind is that once the objective of the central bank goes beyond strict inflation targeting, monetary policy needs an arbitrage between often conflicting objectives (typically unemployment and inflation). It is the essence of the dual mandate. This of course moves monetary policy out of the realm of technocratic choice, and makes it a political institution (Stephen King explains it nicely). I would argue that this is normal once we abandon the ideal-type of frictionless neoclassical economics, and we accept that we may have a tradeoff between inflation and unemployment. But this is not the issue here. The issue, and the puzzle, is why transforming the choice from technocratic to political, should necessarily lead to giving up independence. Read more